Total hip replacement in juvenile chronic arthritis

Area of Science:

• Orthopedics
• Rheumatology
• Surgical Innovation

Background:

• Juvenile chronic arthritis (JCA) often leads to significant hip joint damage.
• Total hip replacement (THR) is a potential treatment for advanced JCA hip disease.
• Long-term outcomes of THR in JCA patients require further investigation.

Purpose of the Study:

• To evaluate the long-term outcomes of total hip replacement in patients with juvenile chronic arthritis.
• To assess pain reduction, hip motion, walking capacity, and implant survival rates.
• To identify factors contributing to implant failure, particularly mechanical loosening.

Main Methods:

• A retrospective review of 50 total hip replacements performed in 33 patients with JCA over a 10-year period.
• Patients were followed for an average of 77 months post-operatively.
• Radiographic assessment was used to evaluate for signs of loosening and other complications.

Main Results:

• Good pain reduction and increased hip motion were observed post-THR.
• Walking capacity showed only a moderate improvement.
• Six hips (12%) required reoperation, with four due to mechanical loosening.
• Radiographic loosening occurred in 10 hips (20%), often associated with poor cement cover and varus femoral stem positioning.

Conclusions:

• Total hip replacement provides significant pain relief and functional improvement in hip motion for JCA patients.
• The moderate increase in walking capacity and high rate of mechanical loosening are concerning.
• Preventive strategies targeting cement coverage and femoral stem alignment are crucial to reduce future revision rates.